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2014-11-05T18:24:22+02:00
A . 4x-1x = -7-3
3x=-10
x= -10 supra 3

B . 6x + 3 = 5x-2
6x-5x=-3-2
x=-5

C . 2x-8 -7=3-3x-15
 2x+3x= +8+7+3-15
5x= 3
x= 3 supra 5 :*
1 5 1
2014-11-05T18:27:46+02:00
A)4x-x=-3-7
3x=10
x=10:3 =3.(3)\

B) 6x + 3 =5x-2
6x-5x=-2-3
+1x=-5
x=-5:1=5 

C) ?